Get visible items in RecyclerView

by

First / last visible child depends on the LayoutManager.
If you are using LinearLayoutManager or GridLayoutManager, you can use 

int findFirstVisibleItemPosition();
int findFirstCompletelyVisibleItemPosition();
int findLastVisibleItemPosition();
int findLastCompletelyVisibleItemPosition();

For example:

GridLayoutManager layoutManager = ((GridLayoutManager)mRecyclerView.getLayoutManager());
int firstVisiblePosition = layoutManager.findFirstVisibleItemPosition();

For LinearLayoutManager, first/last depends on the adapter ordering. Don’t query children from RecyclerView; LayoutManager may prefer to layout more items than visible for caching.

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